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Fixed LP bug #914560.

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The patch for MWL #247 forgot to initialize the TABLE::ext_key_parts and
TABLE::ext_key_flags of the temporary tables by a query. This could cause
crashes for queries the execution of which needed creation of temporary
tables.
This commit is contained in:
Igor Babaev
2012-01-17 03:26:49 -08:00
parent 01dc15f3a7
commit 7902a73d4c
4 changed files with 54 additions and 3 deletions
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25
mysql-test/r/innodb_ext_key.result
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@@ -561,6 +561,29 @@ Handler_read_next 3
Handler_read_prev 0
Handler_read_rnd 0
Handler_read_rnd_next 0
set optimizer_switch=@save_ext_key_optimizer_switch;
DROP DATABASE dbt3_s001;
use test;
#
# LP Bug #914560: query containing IN subquery
# + extended_keys = on
#
set @save_optimizer_switch=@@optimizer_switch;
SET optimizer_switch='materialization=on,semijoin=on';
SET optimizer_switch='extended_keys=on';
CREATE TABLE t1 (a int, b int) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1,1), (2,2);
SELECT * FROM t1 WHERE 2 IN (SELECT MAX(s1.a) FROM t1 AS s1, t1 AS s2);
a b
1 1
2 2
EXPLAIN
SELECT * FROM t1 WHERE 2 IN (SELECT MAX(s1.a) FROM t1 AS s1, t1 AS s2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> const distinct_key distinct_key 5 const 1
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join)
2 MATERIALIZED s1 ALL NULL NULL NULL NULL 2
2 MATERIALIZED s2 ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join)
DROP TABLE t1;
set optimizer_switch=@save_optimizer_switch;
set optimizer_switch=@save_ext_key_optimizer_switch;
SET SESSION STORAGE_ENGINE=DEFAULT;